A317612 - cp's OEIS frontend

A317612 For k >= 1, fill a k X k square with the numbers 1 to k^2 by rows left to right and top to bottom; then read the square by a square clockwise spiral beginning at the top left and spiraling inwards.

n	a(n)
1	1
2	1
3	2
4	4
5	3
6	1
7	2
8	3
9	6
10	9
11	8
12	7
13	4
14	5
15	1
16	2
17	3
18	4
19	8
20	12
21	16
22	15
23	14
24	13
25	9
26	5
27	6
28	7
29	11
30	10
31	1
32	2
33	3
34	4
35	5
36	10
37	15
38	20
39	25
40	24
41	23
42	22
43	21
44	16
45	11
46	6
47	7
48	8
49	9
50	14
51	19
52	18
53	17
54	12
55	13
56	1
57	2
58	3
59	4
60	5
61	6
62	12
63	18
64	24
65	30
66	36
67	35
68	34
69	33
70	32
71	31
72	25
73	19
74	13
75	7
76	8
77	9
78	10
79	11
80	17
81	23
82	29
83	28
84	27
85	26
86	20
87	14
88	15
89	16
90	22
91	21
92	1
93	2
94	3
95	4
96	5
97	6
98	7
99	14
100	21
101	28
102	35
103	42
104	49
105	48
106	47
107	46
108	45
109	44
110	43

[1, 1, 2, 4, 3, 1, 2, 3, 6, 9, 8, 7, 4, 5, 1, 2, 3, 4, 8, 12, 16, 15, 14, 13, 9, 5, 6, 7, 11, 10, 1, 2, 3, 4, 5, 10, 15, 20, 25, 24, 23, 22, 21, 16, 11, 6, 7, 8, 9, 14, 19, 18, 17, 12, 13, 1, 2, 3, 4, 5, 6, 12, 18, 24, 30, 36, 35, 34, 33, 32, 31, 25, 19, 13, 7, 8, 9, 10, 11, 17, 23, 29, 28, 27, 26, 20, 14, 15, 16, 22, 21, 1, 2, 3, 4, 5, 6, 7, 14, 21, 28, 35, 42, 49, 48, 47, 46, 45, 44, 43]

cp's OEIS Frontend

A317612 For k >= 1, fill a k X k square with the numbers 1 to k^2 by rows left to right and top to bottom; then read the square by a square clockwise spiral beginning at the top left and spiraling inwards.

Table of values

List of values

n	a(n)
1	1
2	1
3	2
4	4
5	3
6	1
7	2
8	3
9	6
10	9
11	8
12	7
13	4
14	5
15	1
16	2
17	3
18	4
19	8
20	12
21	16
22	15
23	14
24	13
25	9
26	5
27	6
28	7
29	11
30	10
31	1
32	2
33	3
34	4
35	5
36	10
37	15
38	20
39	25
40	24
41	23
42	22
43	21
44	16
45	11
46	6
47	7
48	8
49	9
50	14
51	19
52	18
53	17
54	12
55	13
56	1
57	2
58	3
59	4
60	5
61	6
62	12
63	18
64	24
65	30
66	36
67	35
68	34
69	33
70	32
71	31
72	25
73	19
74	13
75	7
76	8
77	9
78	10
79	11
80	17
81	23
82	29
83	28
84	27
85	26
86	20
87	14
88	15
89	16
90	22
91	21
92	1
93	2
94	3
95	4
96	5
97	6
98	7
99	14
100	21
101	28
102	35
103	42
104	49
105	48
106	47
107	46
108	45
109	44
110	43

n	a(n)
1	1
2	1
3	2
4	4
5	3
6	1
7	2
8	3
9	6
10	9
11	8
12	7
13	4
14	5
15	1
16	2
17	3
18	4
19	8
20	12
21	16
22	15
23	14
24	13
25	9
26	5
27	6
28	7
29	11
30	10
31	1
32	2
33	3
34	4
35	5
36	10
37	15
38	20
39	25
40	24
41	23
42	22
43	21
44	16
45	11
46	6
47	7
48	8
49	9
50	14
51	19
52	18
53	17
54	12
55	13
56	1
57	2
58	3
59	4
60	5
61	6
62	12
63	18
64	24
65	30
66	36
67	35
68	34
69	33
70	32
71	31
72	25
73	19
74	13
75	7
76	8
77	9
78	10
79	11
80	17
81	23
82	29
83	28
84	27
85	26
86	20
87	14
88	15
89	16
90	22
91	21
92	1
93	2
94	3
95	4
96	5
97	6
98	7
99	14
100	21
101	28
102	35
103	42
104	49
105	48
106	47
107	46
108	45
109	44
110	43

n	a(n)
1	1
2	1
3	2
4	4
5	3
6	1
7	2
8	3
9	6
10	9
11	8
12	7
13	4
14	5
15	1
16	2
17	3
18	4
19	8
20	12
21	16
22	15
23	14
24	13
25	9
26	5
27	6
28	7
29	11
30	10
31	1
32	2
33	3
34	4
35	5
36	10
37	15
38	20
39	25
40	24
41	23
42	22
43	21
44	16
45	11
46	6
47	7
48	8
49	9
50	14
51	19
52	18
53	17
54	12
55	13
56	1
57	2
58	3
59	4
60	5
61	6
62	12
63	18
64	24
65	30
66	36
67	35
68	34
69	33
70	32
71	31
72	25
73	19
74	13
75	7
76	8
77	9
78	10
79	11
80	17
81	23
82	29
83	28
84	27
85	26
86	20
87	14
88	15
89	16
90	22
91	21
92	1
93	2
94	3
95	4
96	5
97	6
98	7
99	14
100	21
101	28
102	35
103	42
104	49
105	48
106	47
107	46
108	45
109	44
110	43